A uniform magnetic field of magnitude 0.20Tis directed along the positive x axis. A positron moving at 1.00x10' m's enters the field along a direction that makes an angle of 80.0° with the x axis. The motion of the particle is expected to be a helix What is the pitch of the trajectory in mm? (m,-9.11x10 kg. g-1.6x10"C)
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